电工技术学报2017，Vol.32Issue(12)：268-276,9.
超声导波检测绝缘子用玻璃钢芯棒缺陷
Defect Detection for Fiber Reinforced Plastics Rod of Composite Insulator with Ultrasonic Guided Wave
摘要
Abstract
Statistics showed that the insulator damages caused by fracture of fiber reinforced plastics (FRP) rod accounted for a large proportion in high voltage line serious accidents. For rapid and accurate detection on the defect of FRP rod, this paper presented a new method: ultrasonic guided wave. According to guided wave theory, characteristics of guided wave propagation in FRP rod from 110kV composite insulator were obtained. The frequency of excitation signal used in simulation and experiment was preliminarily determined by the longitudinal and torsional mode dispersion curves of guided wave. Through finite element simulation, waveforms of guided wave propagating in FRP rod with and without defect were presented. Experiment based on theoretical analysis and simulation results was carried out. It is shown that both of 10-cycle 40kHz and 20-cycle 32kHz L(0,1) guided waves could efficiently detect defection in FRP rod, and the former could detect the accurate position of defect while the latter is more suitable for longer FRP rod. Within a certain range, the longer FRP rod is, the more obvious flaw waves are and the better performance of detection is. It is feasible and effective to defect detection of FRP rod from composite insulator with ultrasonic guided wave technology.关键词
玻璃钢芯棒/超声导波/频散曲线/缺陷检测/有限元仿真Key words
Fiber reinforced plastics rod/ultrasonic guided wave/dispersion curves/defect detection/finite element simulation分类
信息技术与安全科学引用本文复制引用
邓红雷,陈力,鲁强,戴栋,李富才..超声导波检测绝缘子用玻璃钢芯棒缺陷[J].电工技术学报,2017,32(12):268-276,9.基金项目
中央高校基本科研业务费专项资金(2014ZM0031),国家高技术研究发展计划(863计划)(2012AA050209)和国家自然科学基金(11372179)项目资助. （2014ZM0031）
